Patch for pneumatic tires.



J. G. MOOMY.

PATCH FOR PNEUMATIC TIRES. I AIPPLIC'ATION FILED APR. 16. 1915.

lxn/tmeooao 73 7'27.

1 9 57'? v Patented Mar. 20, 1917.

tll il iili l fil @Tihiliftitd JOSEPH G. 1VIOOM'Y, OF ERIE, EPENNSYLVANIA.

PATGH FOR PNEUMATIC TIRES.

To all whom it may concern:

Be it known that I, Josnrn G. Moour, a

' 5 Pennsylvania, have invented new and useful in the claims.

Improvements in Patches for Pneumatic Tires, of which the following is a specification.

This invention relates to patches for pneumatic tires and consists in certain iinprdvements in the construction thereof as will be hereinafter fully described and pointed out The invention is particularly designed for patches for inner tubes for pneumatic tires. In making perfect patches for the tube it is desirable that the material of which they are formed be plastic so as to readily conform to the tube and adhesive so as to adhere perfectly to the tube. This can be accomplished under some circumstances by the utilization of a non-vulcanized compound. The diiiicult-y with these compounds is that they flow under the pressure of the tube so that there is an adhesion between the tube and the gum or compound and the gum or compound and the casing of the tire. One of the purposes or" the present invention is to provide a patch using these compounds and obviating the ditiieulties above mentioned.

The invention is illustrated in the accompanying drawings as i'oilowsz Figure 1 shows a plan view of the patch.

Fig. 2 a. side elevation.

Fig. 3 a section of a fragment of a tire and inner tube showing the position of the parts prior to inflation of the inner tube.

Fig 4 a similar section showing the position of the parts subsequent to the inflation of the inner tube.

1 marks the body of the patch which is made of? non-vulcanized compound and 2 a backing ordinarily of giazed fabric. The glazed fabric extends beyond the rubber compound a suflicient distance to form a-dain when the parts er. subjected-to pressure preventing the outfiowing of the rubber compound. The posit on assumed the parts under pressure is shown in r 1g. 4. In the drawings Figs. 3 and i the tire casing Specification of Letters Patent. Pwiggmtgfl Elfi -g g 26 1% Y Application filed April 16, Y

1915. serial no. 215%.

is marked 5 and the inner tube 6. Observing Fig. 5 it shows the patch in the position it assumes prior to inflation. in Fig. it shows the position of the parts after inflation. The extended edge of the glazed fabric 2 forms a. dam which in contact with the inner tube as it is forced against it pro rents the spreading of the compound to. a point outside of the glazed fabric.

The rubber compound may be varied. Preferably it is not onlynon-vrdcanized but non-vulcanizinq. Une example of such com- -pound is Para gum, gutta-percha, equal portions, and a suitable. filling such as whit ing. This compound will become very soft and tacky on the-application of gasolcne or some other solvent but when the grasolene evaporates and becomes dry it is quite firm. in using'this patch gasolene is applied to the patch en as to soften the material so that it can readily stick to the tube. The glazed fabric prerents the flowing: of the soft gum under the pres. ire of the inner tube to a point beyond the glazed fabric. in this way the objection to this material for a patch obviated.

i prefer to form the body of the compound of materials of varying consistency making the surface of greater ';-l:isticity and adhesireness. This may be done by making a compound of two iayers and 4, it of the compound above described and the face of PM guinulone with a filler. Other ina- 'terials than glazed fabric may be used for the backing so long as it extends far enough and has suliicient strength to form a dam at the edge.

-Vhat I claim as new is:

1. A patch for pneumatic tires comprisins: a layer oi-non-uulcaiiized rubber compound; and abet-king of non-adhesive material extending outside of the edge of: the layer of compound and forming a dam when under pressure confining the rubber conipound, each of the component parts being initially in a layer in a separate piaue.

2. A patch for pneumatic tires compris ing a body of non-vulcanized rubber comface of such compound; and a backing on In testimony whereof I have hereunto set the back face of the compound of non-admy hand 1n the presence of two subscnblng heslve matenal extendlng outslde the edge mtnesses.

of the layer of compound and fomning :t JOSEPH G. MOOMY. 5 damwhen under pressure confining the Witnesses:

compound, each of the component parts be- THOMAS C. MILLm,

'ing initially in a layer in a separate plane. B. MY. HARTMAN. 

